Mezzanine debt: What it is and when to use it

This article explains mezzanine debt, a hybrid financing tool that combines features of both debt and equity. You'll learn how it's structured, when to consider it for growth, and how it impacts the borrower’s ownership.

What is mezzanine debt?

Mezzanine debt is a hybrid form of capital that combines features of both debt financing and equity financing. Think of it as a funding bridge that fills the gap between the amount a traditional bank will lend, known as senior debt, and the firm’s existing equity base. This type of financing is a flexible tool when you need capital for growth but want to minimize giving up ownership while offering a favorable rate of return to the lender.

While every situation is different, some investors in this space target middle market companies that are already generating revenue, typically between $2 million and $20 million. These businesses often need capital for inventory but are looking for alternatives to traditional bank loans or asking their original investors for another round of funding.

The name "mezzanine" comes from its position in the middle of a company's capital structure, just like a mezzanine level in a theater is between the ground floor and the balcony. This middle position means it's a higher risk for a lender than a standard bank loan but can be less dilutive for existing shareholders than a new equity issuance. It offers a unique balance of risk and reward for both the company and the lender.

Where does mezzanine debt fit in the capital structure?

A company's capital structure is like a ladder, with different funding sources on each rung, each with a different level of risk and priority for repayment. Mezzanine debt occupies the middle rungs of this ladder.

This hierarchy is most important when it comes to repayment. In a worst-case scenario like a bankruptcy or liquidation (types of liquidity events), there's a clear order for who gets paid back first, often managed through distribution waterfalls. Senior lenders are at the top and are repaid first. Only after they are fully repaid do mezzanine lenders get their money back, as dictated by liquidation preferences. Equity holders, who represent ownership, are last in line, and shareholders within the same class are often treated equally, or pari-passu. This priority explains why mezzanine debt comes with higher costs and more complex arrangements, which are detailed in term sheets.

How is mezzanine debt structured?

Because mezzanine lenders take on more risk than senior lenders, the financing is structured to offer them a higher potential return. This return typically comes from two main components: interest payments on the loan and a share in the company's future success. This hybrid structure is what makes mezzanine financing unique.

The specific terms can vary, but they are always designed to compensate the lender for the additional risk of being second in line for repayment, often through equity kickers that provide incentives to support attractive total returns. You need to understand both parts of the deal to see the full cost of the capital.

Current interest vs. PIK interest

Mezzanine loans often include two types of interest payments, giving the borrower some flexibility in how you manage your cash flow.

• Current cash interest: This is a straightforward, periodic cash payment, much like the interest on a standard loan. You pay this interest regularly, typically monthly or quarterly, which can impact your company's operating budget.

• Payment-in-kind (PIK) interest: With PIK interest, you don't pay cash right away. Instead, the interest amount is added to the total loan balance, causing the principal to grow over time. This helps preserve your company's cash flow in the short term but means your total debt will be larger in the future.

Warrants and other equity kickers

While warrants are one type of equity instrument, they are not the most common form of equity compensation. This is because their primary role is to serve as an "equity kicker" for lenders in mezzanine or convertible debt structures, rather than as a direct grant to a company's existing equity holders. For management teams at PE-backed LLCs, profit interest units (PIU) are the clear majority of equity grants issued, making up 73.9% of new grants in 2024. Warrants are a less frequent alternative for this purpose, alongside capital interest units, options, and custom interests.

It's not an immediate grant of stock, but like other convertible securities, it adds a new and complex security type to your company's ownership structure. This feature is what makes mezzanine financing a hybrid instrument and adds significant complexity to your cap table.

When should you consider mezzanine debt?

Mezzanine debt is best used for specific, transformative events that can create significant enterprise value for your company, impacting key metrics like pre-money valuations vs. post-money valuations. Consider this path when a clear opportunity for growth exists that traditional financing can't fully cover. In fact, some analysts believe mezzanine deals are predicted to surge as tighter credit conditions create new opportunities.

Here are some of the most common scenarios that may call for mezzanine financing:

• To fund a mergers and acquisitions (M&A) deal like an acquisition or buyout

• To accelerate growth without significant equity dilution

• To finance a recapitalization or a shareholder transaction like a leveraged buyout (LBO)

What are the tradeoffs of mezzanine financing?

For PE sponsors and corporate leadership teams, choosing mezzanine debt involves a strategic calculation. It can be a powerful tool to achieve specific financial objectives, but its costs and structural complexities must be carefully weighed against the potential returns.

• Strategic advantage: Less dilution and enhanced equity returns. The primary advantage of mezzanine financing is accessing significant capital while minimizing equity dilution compared to a traditional equity raise. For a PE sponsor executing a leveraged buyout, this means contributing less equity capital, which can significantly boost the potential internal rate of return (IRR). For an established company, it allows for funding a strategic acquisition or expansion without diluting existing shareholders. This lets current equity holders retain more ownership and upside in the company's growth.

• Drawback: Cost, covenants, and complexity. Mezzanine debt is more expensive than senior debt, with a typical loan for a performing company expected to yield 12.5-14% for the lender. For early-stage companies, a common form of junior debt is a convertible note. The median interest rate on these notes was between 7% and 8% in the first quarter of 2025 and the second quarter of 2024, respectively. This cost compensates investors for taking a riskier, subordinated position in the capital stack. Beyond the cost, the financing agreements often come with covenants that can restrict the company's operational and financial flexibility. The true complexity, however, comes from the warrants. These equity kickers can complicate the capital structure, add layers to future financing rounds, and create challenging negotiations in a potential exit scenario.

How to manage complex financing on your cap table

Once you accept mezzanine debt with warrants, your cap table instantly becomes too complex for a simple spreadsheet, requiring dedicated cap table management. Manually tracking different security types often leads to costly errors and version control nightmares, especially when market conditions force changes. As valuations shifted throughout 2023, companies undertook the immense administrative task of repricing nearly 100,000 grants in that year alone, a process that's fraught with risk when managed on a spreadsheet.

Different types of investors, auditors, and potential acquirers expect professional-grade accuracy and transparency. A clean, auditable cap table is a sign of operational maturity and builds the trust needed to secure future financing or execute a strategic exit, which involves complex deal structures like an asset sale vs. stock sale. This is where equity management software designed to handle this complexity becomes so important.

Model your waterfall with confidence

Modeling the payout waterfall for a financing round that includes mezzanine debt and warrants is notoriously complex and prone to error in a spreadsheet. To see how every stakeholder, from senior lenders to equity holders, would be paid out in an exit scenario, you need a tool built for this complexity.

Before an exit, this becomes even more valuable. Use Carta's Waterfall Modeling to accurately forecast how proceeds would be distributed to every single stakeholder. This includes mezzanine lenders with their specific terms, something that is incredibly difficult and risky to model correctly in spreadsheets. To see how Carta can also help you structure and fund complex transactions like acquisitions, book a demo of our SPV platform.

Frequently asked questions about mezzanine debt

Why is mezzanine financing considered risky?

Mezzanine financing’s risk comes from being subordinate to senior debt within the private credit market and often unsecured by assets, meaning lenders have a higher chance of loss if the company fails.

What is the difference between senior debt and mezzanine debt?

Senior debt is the safest form of debt financing, is first to be repaid, and is often secured by the company’s assets, while mezzanine debt is riskier, second in line for repayment, and typically unsecured.

Can mezzanine debt be converted to equity?

Mezzanine debt itself does not typically convert, but the attached warrants give the lender the right to purchase equity, which provides a similar economic outcome for the lender if the company succeeds.